Mortising-machine.



J. A. & F. W] MILLER.

MORTISING MACHINE.

APPLICATION FILED APR. 18, 1911. 1,O37,288 Patented Sept. 3, 1912.

Z SHEET8SHEET 1.

J. A. & PVW. MILLER.

MORTISING MACHINE.

APPLICATION FILED APR. 18, 1911.

Patnted Sept. 3,1912.

2 SHBETS-SHEET 2.

UNITED STATES PATENT OFFICE.

MQRTISING-MACHINE.

Specification of Letters Patent.

Application filed April 18, 1911.

Patented Sept. 3, 1912. Serial No. 621,899.

T 0 all whom it may concern:

Be it known that we, JOHN A. MILLER and FREDERICK W. MILLER, both residents of Carrick, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Mortising-Machines, of which the following is a specification.

Our invent-ion relates to wood working machines and particularly to machines of this general class that are utilized for cutting mortises, recesses or channels, such for example as are usually cut in the edges of doors to receive combined latch and lock mechanism.

One of the objects of our invention is to provide a machine of the character above indicated in which the cutting tool is simultaneously rotated and moved laterally by means of one set of gearing and a single operating member.

Another object of our invention is to provide means whereby the lateral movements of the cutting tool may be automatically arrested and reversed at any desired predetermined points.

A further object of our invention is to provide a relatively light, simple and compact mechanism for performing the functions which have heretofore been performed by separate devices or by independently operated mechanisms.

In the accompanying drawings Figure 1 is a rear elevation of the machine embodying our invention; Fig. 2 is a side elevation of the machine shown in Fig. 1, parts being broken away; and Fig. 3 is a sectional. view on line 33 of Fig. 2, the gear wheels and certain cylindrical members being shown in full contour.

The cutting tool 1, which is here shown as a rotatable bit or anger, is'mounted in suitable bearing members 2 and 3 pertaining to a carriage 4 and is provided with an actuating bevel gear wheel 5, with which it has a splined and grooved or equivalent connection so that it can be moved axially therethrough. The bearing member 3 receives the hub 5 of the gear wheel 5 and a fly wheel 6 is fastened to the end of the hub to perform the functions that usually pertain to such devices.

The carrier 4: is mounted upon a frame 7, the top member 7 and base member 8 of which are connected at one side by a rod 9 and at the other side by a shaft 10 which is provided with a groove 11 or is otherwise formed to rotate a gear member 12 and also permit longitudinal movement thereof along the shaft. The gear member 12 is rotatably mounted in an upper projection 13 of the carriage to receive the shaft 10.

Mounted in suitable hearings in the carriage 1 is a shortshaft 14 having a bevel gear wheel 15 at one end to mesh with the bevel gear wheel of the member 12 and with a bevel gear wheel 16 on its other end to mesh with the bevel gear wheel 5 on the tool 1. The lower projection 17 of the carriage is provided with a rotatable collar or sleeve 18 that also has a sliding connection with the shaft 10 which extends through it. The projections 13 and 17 are at one side of the carriage. At the other side thereof, projections are bored to fit the rod 9 on which they slide. The carriage is supported and guided in its movement by the rod 9 and shaft 10 and is comparatively broad and flat in shape. Below the bottom memher 8 of the frame, the shaft 10 is provided with a bevel gear wheel 19 that meshes with a similar wheel 20 upon a horizontal shaft 21 having hearings in downwardly projecting portions 22 and 23 of the frame member 8. The outer end of the shaft 21 is provided with a crank arm 24 and with a circular disk or plate 25 to which the crank arm is bolted, an operating handle 26 being provided at the outer end of the crank arm.

The carriage 4 is provided with a rearwardly projecting screw threaded rod 27 which is adjacent and parallel to the tool 1, and. mounted upon the screw threaded rod is a nut 28 having an operating handle 29. A reduced portion of the nut 28 is surrounded by one end of an arm 30. the other end of which receives the outer end of the shaft of the tool 1 and is held thereon by means of a nut 31.

It will be understood that the construethe other the nut 28 will travel forward or backward upon the screw rod 27 and will carry with it the tool 1, the limit of movement inward being determined by a stop 'collar 32 which is mounted upon the tool shaft and may be adjusted longitudinally thereon and clamped at any desired point.

.In the upper portion 7 of the frame 7 is mounted a nut or internally threaded sleeve 34 having a bevel gear wheel 35 upon its upper end. A screw threaded shaft 36 ention just described is such that, as the crank, handle 29 is turned in the one direction or gages the nut 34 and is provided at its lower end with a head 37 engaging a socket in the carriage 4. The upper portion 7 of the frame 7 is also provided with two substantially vertical projections 38 and 39 which are provided with bearings for a shaft 40, to

one end of which is secured a bevel gear wheel 41 to mesh with the bevel gear wheel on the sleeve nut 34. Between the two bearings, the shaft 40 has mounted thereon two bevel gear wheels 42 and 43 which are normally free to turn on the shaft. The shaft 10 is provided with a bevel gear wheel 44 at its upper end which meshes with the two gear wheels 42 and 43 on the horizontal shaft 40. Each of the gear wheels 42 and 43 is provided upon its inner face with a clutch member 45, and, keyed or splined' to the shaft 40 between these wheels, is a double clutch member 46 which may be moved to engage the clutch member on either of said wheels in order that the shaft 40 may be rotated in the one direction or the other. The double clutch member 46 is operated by a bell crank lever 47, one arm of which engages said member and the middle portion of which is pivotally mounted upon the frame. The other arm of the bell crank lever 47 is pivotally connected to the upper end of a vertical rod 48 which projects loosely through a lug 49 on the carriage 4 and also through a lug 50 on the base member 8 of the frame 7. A stop collar 51 is adjustably clalnped to the rod 48 below the lug 49 and is provided with a buffer spring 52 on its upper side, and a similar stop collar 53 is adjustably clamped to the rod above the lug 49 and is provided with a buffer spring 54 on its lower side. The two stop collars 51 and 53 are located upon the rod in accordance with the length of the mortise which it is desired to cut, and when the limit of sidewise movement of the cutting tool is reached, the corresponding buffer spring is engaged by the lug 49 and, when compressed suificiently to overcome the friction and inertia of the middle clutch member and its operating lever, the said member is thrown from its posit-ion in engagement with one of the gear wheel clutch members into engagement with the other gear wheel clutch member, and thus effects a reversal of the movement of the carriage.

The frame 7 is provided with two pairs of clamping jaws 55, one pair being located at the top and the other at the bottom of the frame. Each pair of jaws is mounted upon a supporting and guiding pin 56, and the two members are moved into and out of clamping position by means of'a screw rod 57 having an operating hand wheel 58, the pin 56 and the screw rod 57 being mounted in a supporting projection 59 with which the frame 6 is provided.

It will be noted that the carriage is com paratively wide and fiat in structure and has its plane in the same plane as that of the main frame, and that furthermore, all of the shafts 21, 10, 14, 40 and the screw shaft 36 are in the same plane and in the plane of the carriage and frame referred to. The clamping jaws are secured directly to the main frame and extend normally thereto. Consequently, the entire structure is compact and is brought very close to the clamping jaws and to the work held therebetween. Less vibration of the frame is had and the power being applied close to the work more effective. The driving shaft is on a fixed part of the main frame and does not move or run with the carriage as in some prior forms of device. The only portion of the device which projects away from the plane of the carriage and frame is the screw 27 which obviously must extend in the line of the axis of the tool.

Although the operation of the machine may be understood from the drawings and the foregoing description, a brief description of the several movements will now be given.

In the use of the machine, it is first clamped to the edge of a door, or to any other body in which it is desired to form a inortise, by means of the clamping aws 55 and the operating screw rods 57, and the crank 24is turned by means of the crank handle 26 in a clockwise direction, thus rotating the tool through the cotiperative action of the shaft 21, gear wheels 20 and 19, shaft 10, gear wheels 12 and 15, shaft 14 and gear wheels 16 and 5, and the carriage is simultaneously moved in the one direction or the other according to the position of the movable clutch member with reference to the clutch members on the gear wheels 42 and 43,. the adjustment of these 'parts being effected in such manner as to insure movement of the carriage to the point at which it is desired to begin the cutting operation. The stop collars on the clutch-shifting rod 48 are then adjusted in accordance with the length of mortise desired, and the handle 29 is turned to move the tool axially into engagement with the material to be cut. The continued rotation ofthe crank 24 produces the desired rotary movement of the tool for cutting the material and, at the same time,

a gradual movement of the carriage, which such depth will be determined by the position of the stop collar on the tool shaft.

It will be understood that the manipulation of the crank arm by means of which the cut-ting tool is fed toward the work may be made in accordance with the character of the tool and the speed at which it is desired to operate. It will also be understood that variations in the size and arrangement of parts and structural details in general which do not change the mode of operation or result, are within the spirit and scope of our invention.

What We claim is:

1. In a portable mortising machine, the combination with a frame, means carried thereby for securing the same to the work, a carriage mounted in the plane of the frame for reciprocatory movement thereon, a rotatable tool mounted on said carriage, cooperating gearing for reciprocating said carriage and rotating said tool, an operat ing shaft mounted in said frame independently of the carriage and in the plane of the frame and carriage, and-means on said carriage for imparting axial movement to said tool.

2. In a portable mortising machine, the combination with a frame, means carried thereby for securing the same to the work,

a carriage mounted in the plane of the frame for reciprocatory movement thereon, a rotatable tool mounted on said carriage, cooperating gearing for reciprocating said carriage and rotating said tool, an operating shaft mounted in said frame independently of the carriage and in the plane of the frame and carriage, means on said carriage for imparting axial movement to said tool, and means on said frame and connected to said carriage for reversing the movement of the carriage at any desired limit in either direction.

3. In a portable mortising machine, the combination of a frame comprising members spaced apart, a rod and a shaft con necting said members, said shaft being rotatable therein, a carriage supported by and movable along said rod and shaft, a rot-atable tool on said carriage, gearing connecting said shaft and tool, means on said frame for reciprocating said carriage, said means being connected to said shaft, and means for rotating said shaft.

4:. In a portable mortising machine, the

combination of a frame having means for fixing it to the Work, a flat carriage movable on the frame, a tool rotatably mounted on said carriage, interconnected shafts and gearing for rotating said tool, said shafts and gearing being mounted in the plane of the carriage and frame, and connections be tween one of said shafts and said carriage for reciprocating the carriage on the frame.

5. In a portable mortising machine, the combination of a frame, comprising a plurality, of connected members in the same plane, means on said frame for fixing the same to the work, a driving shaft rotatably mounted on said frame with its axis in the plane thereof and a carriage slidably mounted on the frame, a rotatable tool on said carriage, shafts and gears connecting said driving shaft and said tool for rotating the same, and means for feeding said tool axially.

6. In a portable mortising machine, the combination of a frame, a shaft rotatably mounted in said frame with its axis in the plane thereof, a reciprocatory carriage movably mounted in said frame, gearing connecting said shaft and carriage for reciprocating the same, gearing connecting said shaft and tool for rotating the same, all of said gearing being mounted in the plane of the frame and of the carriage, and a driving shaft rotatably mounted in said frame and connected to said shaft.

7. In. a portable mortising machine, the combination of a frame having means thereon for securing it to the Work, a shaft rotatable in said frame with its axis in the plane thereof, a reciprocatory carriage movably mounted in said frame, gearing connecting said shaft and said carriage for reciprocating the same, and embodying a shifting clutch, gearing connecting said shaft and tool for rotating the same, all of said gearing being mounted in the plane of the frame and of the carriage, a driving shaft rotatably mounted in the frame and connected to said shaft, and means connecting said carriage and clutch for shifting the clutch on movement of the carriage.

In testimony whereof, We have hereunto set our hands. I

JOHN A. MILLER. FREDERICK W. MILLER. Witnesses:

Rom. G. PFEIL, J OHN BURMASTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

